io.write([[a = 1;
b = a;
b = b + 1;]] .. "\n");
a = 1;
b = a;
b = b + 1;
io.write("a: "..a .."\n");
io.write("b: "..b .."\n");
io.write([[c = {1};
d = c;
d[1] = d[1] + 1;]] .."\n");
c = {1};
d = c;
d[1] = d[1] + 1;
io.write("c: "..c[1] .."\n");
io.write("d: "..d[1] .."\n");